Imagine several totally obvious bear traps or other non-hidden location traps in a perfectly well-lit room. Then the room swarms with enemies and it's battle time. Even if we're going to leave the traps on the map and presume that the characters retain a decent idea of where they are, it still seems as if there should be more chance of setting one off in the heat of battle, right?
Does it make any sense to try and model these mechanically as traps or do they become a custom battlefield obstruction of some kind? My first thought would be:
If someone if attacked within x feet of the trap, or attacks someone within x feet of the trap, they should make a reflex save to see if they have set it off (and if it is set off, another save for damage).
Thanks for any thoughts.